Question
Name the first organism that invaded land.
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| Attribute $\rightarrow$ Ecological Unit $\downarrow$ | Age | Flow of Energy | Natality | Predator prey relationship |
| Individual organism | | | | |
| Population | | | | |
| Commupity | | | | |
| Ecosystem | | | | |
| S. No. | Column I | S. No. | Column II |
| A. | Cleavage | 1. | Outer layer of the blastocyst that attaches to the endometrium during implantation. |
| B. | Implantation | 2. | Mitotic divisions of the zygote in quick succession. |
| C. | Inner cell mass | 3. | Embedding of the blastocyst in the endometrium of uterus. |
| D. | Trophoblast | 4. | Release of secondary oocyte from the ovary. |
| E. | | 5. | Group of cells attached to one end of trophoblast that differentiate into embryo proper. |